Henry h



(No Model.)

- v H. H. ELBREG.

' SURGICAL CHAIR. No. 412,371. Patented 001;. 8, 1889.

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FIG .1.

" .UNITED STATES PATENT OFFICE.

HENRY [-I. LBREG, or INDIANAPOIJIS, INDIANA.

SURGICAL CHAIR.

SPECIFICATION forming part of Letters Patent No: 4=12,371, dated October 8, 1889.

. Application filed December 23, l887. Serial No. 258,790. (No model.)

To all whom it may concern:

Be it known that I, HENRY H. ELBREG, a

citizen of the United States, and a resident of nection with the accompanying drawings, and

then particularly referred to, and pointed out -in the claims.

Referring to the drawings, in which like parts are indicated by similar reference-letters wherever they occur throughout the various views, Figurel is a view taken in V61.

tical section from front to rear of a chair embodying my improvements, the chair being in its normal position and the section being taken between the arm-rest and the edge of the back, the parts being shown in elevation just as though one side of the platform and the arm and arm-supports upon one side were removed. v Fig. 2 is a similar view of the chair folded out to form a surgeons'operatingtable. Fig. 3 is a rear elevation of the rocker-frame with the leg-rest removed, showing the means for locking the back and seat sections, so that they will move in unison. Fig. 4 is a detail inverted plan view of aportion of the seatsection and leg rest. Fig. 5 is an enlarged detail edge view of irons for coupling the back and seat sections to the arms. Fig. (3 is an inside elevation of the stirrup-bar and its box. Fig. 7 isadetail View, in transverse.

section, through one of the back-posts, showing the beveled end of one of the bolts which look back to links which couple the back and seat sections.

The base or platform A and rocker-frame B, including the arms I) and their supports 1) 19. with the connecting cross-stretchers a and b and the spring 0, coupling the rocker to .the' base, do not differ materially from the ordinary platform parlor rocker-frames now in common use, and 'need not be therefore specifically described, for it is upon this wellknown structure that I have mounted my improvements, which, while they are nearly concealed from sight, convert the simple parlorrocker into the surgeons operating chair or table.

The back-section D, seat-section E, and legsection F are united together by hinge-couplings, and are suspended from the upper ends of the arm-posts b b of the rocker-frame by iron couplings. The back-section is pivoted between the two rear arm-posts by the coupling-irons 01 b*. The coupling-irons d are plates let into the edges of the back-posts. They have pivot-pins projecting from them, which enter perforations in the plate I), which are let into the inside upper ends of the arm-posts 5 The seat-section E is coupled to the back D by metal links c. One end of each of the links e is pivoted upon the pins which project from the plates d, the links being arranged between the plates d b. The opposite ends of the links are pivoted upon stud-bolts which enter the edge rails of the seat-section. The opposite or front end of the seat-section is coupled to the front arm-rest by links 6. The leg-rest F is hinged to the front seat-section by hingeplates f f. I The links c, which connect the back and seat sections, are normally held rigid with the back-posts by the spring lock ing-bolts G, so that when the back is turned down the seat-section is carried up until the parts assume the position shown in Fig. 2, so that the patient may sit in the chair in the position shown in Fig. 1, and when the position is changed to the position shown in Fig. 2, or to any desired inclination, the patient need not be disturbed; but when it is desired to drop the seat down out of the way during an operation to form a tray for a basin after the patient is in position this is readily accomplished by pulling the lever g, which with draws both of the spring-bolts and allows the seat to swing down in a horizontal plane until the links e c assume the vertical position. The bolts G are united to a pivoted arm g, the connections being upon opposite sides of the pivot-bolt of arm g, so that when the lever-handle g is pulled out both bolts are si multaneously withdrawn. Iprefer to have the bolts G actuated by a spring, as 9 so that they will automatically catch when the seat is again thrown to its position by the curved arm H, which is secured upon the rock-shaft h, which rock-shaft has its bearings in the opposite rockers, one end of which shaft projects through the rocker to the outside, and is square or angular upon the projecting end to furnish a key-seat for a key by which the shaft is turned, and the seat is elevated and gradually lowered, as seen in Fig. 3. The back is held firmly at any desired anglabya toothed segment I, which is journaled upon a pin secured in a lugplate i, which plate is secured to the back D. This segment passes through a metal guide-box 'i, which is secured underneath the cross-stretcher 12 The guidebox 2" has an upwardly-projecting lug i which is parallel with the back of the stretcher b but stands off from it to admit of the end of the pivoted lever I passing between it and the cross-stretcher b for the purpose of engaging either one of the notches in the segment I, and thus lock the back in any desired position.

To the front cross stretcher b of the rocker-frame B is journaled a toothed segment J, which passes through a metal guideboxj, which box is secured upon the inside of the crossstretcher a of the platform A. There is a lever J pivoted upon the inside of the stretcher a, in a position to have its detent brought into any one of the notches in the segment J underneath the box j, and thus lock the rocker-frame rigidly to the base and at any desired inclination.

Underneath the forward end of the seatsection E is a toothed bar 70, so arranged as to engage the free end of a swinging propbar K, which is journaled in a lug-plate k, which is secured underneath the leg-section F. The prop-bar orlever K hasashortcrankarm 10 to which is connected one end of a link 10 The opposite end of this link is connected to a lever K, which is pivoted underneath the leg-section near the end, for the purpose of drawing the bar out of engagement with the rack-bar k, or placing it into such engagement when it is desired to lower the leg-section, as in Fig. 1, or elevate it, as in Fig. 2.

Secured to the inside of one of the platform sides A is a device for elevating one side of the chair to cause it to assume the Sims position. This device consists of the metal plate L, which is secured to the platform A, the prop L fitted to slide in the guide-box Z, the bent lever L which is pivoted upon a stud-bolt in the platform and jointed to the upper end of the prop L, and a pivoted dog 1', which is arranged to bear upon lever L when depressed and retain the prop in its lower position.

The heel-stirrup M is of ordinary construction, but its connection by the stirrup-bar m and its box m, Fig. 6, to the chair arm and support is of my invention. The open metal box m is let into the upper end of the armsupport 12, its bottom coming flush with the inside face of the arm and its support. The upper screw-lug of this box extends up upon the arm 7), and the screw which passes through it also serves as the pivot-bolt for the link 6. The screw which passes through the lower screw-lug enters the arm-support 1). Thus the box while serving to guide the stirrupbar also acts as a securing-plate to strengthen the joint between the arm I) and arm-bracket b. The box m is wider at its rear end, and from its upper edge projects a tooth m to engage any of the notches in the upper edge of the stirrup-bar m, so that the stirrup may be adjusted nearer to or farther from the end of the arm, as desired. In the position shown the tooth projects from the upper edge of the box and is at the rear of the arm-bracket, while the notches in the bar m are upon the upper edge; but the result would be the same if the box were reversed to bring the tooth underneath and in front; but, of course, the stirrupbar m should also be turned to bring its notches upon the lower edge.

It will be seen that by means of the segment J and lever J the chair-frame may be held rigid at any desired inclination, and that after an operation, if the patient has been put under the influence of an anaesthetic, the vital forces are restored by throwing out the lever J and-subjecting the patient to a gen tle rocking motion.

I do not limit myself to the exact construction of the several parts, as it is evident that mechanical changes may be made without Varying the invention.

What I claim, and desire to secure by Letters Patent, is-

1. In a surgical chair, the-combination of the platform, the rocking frame and springcoupling connecting the two, the back, seat, and leg sections hinged together, the pivots securing the back-section to the rear of the rocking frame, the pivoted links connecting the seat-section to the front of said frame, the pivoted segment I, its guide and lockinglever, for securing the back and seat sections in the desired position, and the pivoted segment J, with its guide and locking-lever, to lock the platform and rocker, substantially as shown and described.

2. The combination, in a surgical chair, of the supporting-frame, the adjustable back and seat sections pivotally secured in said frame, with the elevating device for one side of the chair, consisting of the plate L, its sliding prop L, the lever L and dogginglever Z, substantially as hereinbefore set forth.

3. The combination, substantially as hereinbefore set forth, of the supporting-frame, the back-section pivotally secured in said frame, the seat-section, and links e, for hinging the said sections together, the links 6, for

swinging the front end of the seat-section to the supporting-frame, locking-bolts for holding the links e parallel with the back-section, and the arm H and rock-shaft h, to elevate and gradually lower the seat-section independent of the back section, for the purpose set forth.

4:. The combination, substantially as hereinbefore set forth, of the platform A, rocking frame B, and spring-connection G, with the back, seat, and leg sections hinged together, as shown, and pivotally connected to the rocking frame, the segment I, hingedto the back-section, guide-box '41, secured upon the cross-stretcher b of frame B, the lever I, also pivoted to said cross-stretcher, the segment J,

upon said pin between said plates, in combt 25 nation with the supporting-frame and adj ustable back and seat sections.

HENRY H. ELBREG.

Witnesses:

F. Jo. DEROHLEY, O. A. TERRELL. 

